We needed to get users to log calls via emails to our KACE K1000 Appliance. The KACE uses its own internal smtp server and sets its own email address as username@kacename.dnsname. As the appliance is within our LAN and our smtp relay is outside, where we have no control, we could not simply add the kbox domain as a subdomain. And for some reason, even though the appliance name can be resolved by dns, GroupWise would not send email to it. There are plenty of tips on how to make this work on other email servers but none for GroupWise, but after much trial and error we finally got it to work. Hope this helps save someone else some time.